Major rework of vm service events.

runtime/observatory/lib/src/app/application.dart

Index: runtime/observatory/lib/src/app/application.dart
diff --git a/runtime/observatory/lib/src/app/application.dart b/runtime/observatory/lib/src/app/application.dart
index c5413c9dd03b5a44a7f38572db10126b725bb5e8..c3c49e4e9fa4f23fc127ec1f8d8acf74e2203bb8 100644
--- a/runtime/observatory/lib/src/app/application.dart
+++ b/runtime/observatory/lib/src/app/application.dart
@@ -64,46 +64,29 @@ class ObservatoryApplication extends Observable {
 
   void _onEvent(ServiceEvent event) {
     switch(event.eventType) {
-      case 'IsolateCreated':
+      case 'IsolateStart':
+      case '_Graph':
+      case 'BreakpointAdded':
+      case 'BreakpointResolved':
+      case 'BreakpointRemoved':
+      case 'GC':
         // Ignore for now.
         break;
 
-      case 'IsolateResumed':
-        event.isolate.pauseEvent = null;
-        break;
-
-      case 'IsolateShutdown':
-        // TODO(turnidge): Should we show the user isolate shutdown events?
-        // What if there are hundreds of them?  Coalesce multiple
-        // shutdown events into one notification?
+      case 'IsolateExit':
+      case 'Resume':
         removePauseEvents(event.isolate);
-
-        // TODO(turnidge): Reload the isolate for now in case it is
-        // paused.  We may need to distinguish an IsolateShutdown
-        // event from a "paused at isolate shutdown" event.
-        event.isolate.reload();
         break;
 
-      case 'BreakpointResolved':
-        event.isolate.reloadBreakpoints();
-        break;
-
-      case 'BreakpointReached':
-      case 'IsolateInterrupted':
-      case 'ExceptionThrown':
-        event.isolate.pauseEvent = event;
+      case 'PauseStart':
+      case 'PauseExit':
+      case 'PauseBreakpoint':
+      case 'PauseInterrupted':
+      case 'PauseException':
         removePauseEvents(event.isolate);
         notifications.add(event);
         break;
 
-      case '_Graph':
-        event.isolate.loadHeapSnapshot(event);
-        break;
-
-      case 'GC':
-        // Ignore GC events for now.
-        break;
-
       default:
         // Ignore unrecognized events.
         Logger.root.severe('Unrecognized event: $event');